Big Power RB30 Engine Build

[DODGY]

Same size as mine work fine on the road and track.

Graham

[Kanzen]

Originally Posted by pupsi

Have I made the right choice in wheel and tyre sizes for a daily driver. Wheel size is 19x9.5 offset+12. Tyre size is 275x30x19, comments please, should I go wider and why??.

This is exactly what I have.

They'll be some slight rubbing under full lock between the tyre and the inner plastic splash guard but other than that it's perfect. Nothing to worry about.

[pupsi]

I'me a bit late in replying, but thanks Guy's

[GTR33-MP]

Can't wait to see the beast in the flesh...give me a bell when yr back from hols..

[30T-WPN]

lol im from Australia and couldnt help responding to the guy who said that stock rb30 cranks can take 11 000rpm haha what a joke, thats bullshit lol rb30's are a dime a dozen around here ive got an r31 skyline with a single cam rb30 pushing 400hp at the wheels with the unopened engine, its fine now but if i decided to start reving it to say 7500 the crank wouldnt last long.

[frostmotorsport]

here we go....

[rockabilly]

Originally Posted by 30T-WPN

lol im from Australia and couldnt help responding to the guy who said that stock rb30 cranks can take 11 000rpm haha what a joke, thats bullshit lol rb30's are a dime a dozen around here ive got an r31 skyline with a single cam rb30 pushing 400hp at the wheels with the unopened engine, its fine now but if i decided to start reving it to say 7500 the crank wouldnt last long.

well my rb30 bottom end has an rb26 head on it, jun cams,gt35r blower and spend most of the day at donny @ 2 bar boost and 7700rpm. no probs,,engine also made 700bhp/660lbs torque ..funny that

[30T-WPN]

ok fair enough 7500 was just a ballpark figure, my point is that the crank will give in a fair bit before 11 000 rpm and i wouldnt rev a stock engine past 7000 without an aftermarket harmonic balancer just for piece of mind and yes im sure your engine is pushing 700hp, and you might rev it past that all day and theres more then a few down here pushing the exact same numbers, but what have you done to the other internals is the question?

And do you want your engine to last for 2-3 years or 15 years??

And how many kms had your rb30 short motor done before you used it?? Ifs its a high km block and your reving its tits off i guarantee you that the front and real seals have started eating into the crank and it needs to be re sleeved, also ideally the stock crank could also do with a linish

[R.I.P.S NZ]

Originally Posted by 30T-WPN

lol im from Australia and couldnt help responding to the guy who said that stock rb30 cranks can take 11 000rpm haha what a joke, thats bullshit lol rb30's are a dime a dozen around here ive got an r31 skyline with a single cam rb30 pushing 400hp at the wheels with the unopened engine, its fine now but if i decided to start reving it to say 7500 the crank wouldnt last long.

Lol, I'm from New Zealand!!!
I'm afraid you are a little misguided.
Have you tried to rev a decent RB30 with a stock crank to 11,000rpm? If not, how do you know its bullshit?
Have you reved a RB30 above the majic 7500rpm you speak of? We have many times, in fact 9000rpm and 2 bar with a stock crank is quite the norm.

What does your 31 do on the 1/4? 14s at 100mph if your real lucky?

Come on man, you've made 2 posts, both of which saying how others on here are full of shyte, when YOU HAVE run 8s on a stock crank and pull close to 10,000rpm at times, get back to us with comments you can actually back up.

Rob

[30T-WPN]

im not saying anyones full of it, not trying to sound up myself im saying that one statement from one guy is in MY OPINION false, no i havent ever tried reving it to 11 grand but have seen many people build engines and if the stock crank could take 11grand then why do all these people use aftermarket cranks that are designed to be safely pushed to 9grand etc etc, i dont want to argue about it so just forget it

[R.I.P.S NZ]

Originally Posted by 30T-WPN

stock rb30 cranks can take 11 000rpm haha what a joke, thats bullshit.

I must have miss read, sorry.

I think you'll find the 11,000rpm comment was directed at RB26 cranks and I know for a fact that has been done reliably many times.

Personally I have been to well over 9000rpm on a stock RB30 crank and run 8s with one.

Alot of these aftermarket cranks form part of a stroker kit and when staying with the same stroke/capacity, many people have been told 'they need a billet crank' when clearly that is not the case, its been proven time and time again that the stock cranks are actually more that up to the task for most poeple.

Rob

[30T-WPN]

yea heaps of people around here are told they need a billet crank to rev the engines hard, maybe people are gettin ripped

Originally Posted by R.I.P.S NZ

a customer of mine with vast experience in big power 26's has just ordered one of our billet mains RB30s, he will specificly run a stock RB30 crank and intends to rev to 11,000+ and make more than 1400hp,
Rob

Rob

So you reckon the crank can take 11 000??

[R.I.P.S NZ]

Originally Posted by 30T-WPN

yea heaps of people around here are told they need a billet crank to rev the engines hard, maybe people are gettin ripped
so you reckon the crank can take 11 000??

I don't know, I've never said they'd take it, my customer has done many 26s reving to 11,000+ and he feels confident he can do it with the 30 as well on a stock crank.

I've found just over 9000rpm is fine so who knows what he can get out of it, time will tell I suppose.

Rob

[shanef]

teardowns would be more necessary on the higher revving engines though yeah?

[pupsi]

Obviously higher revving engines will require rebuilding more often than those that aren't highly revved??